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1438253-93-0

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1438253-93-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1438253-93-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,3,8,2,5 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1438253-93:
(9*1)+(8*4)+(7*3)+(6*8)+(5*2)+(4*5)+(3*3)+(2*9)+(1*3)=170
170 % 10 = 0
So 1438253-93-0 is a valid CAS Registry Number.

1438253-93-0Upstream product

1438253-93-0Relevant articles and documents

Solvent/oxidant-switchable synthesis of multisubstituted quinazolines and benzimidazoles via metal-free selective oxidative annulation of arylamidines

Lin, Jian-Ping,Zhang, Feng-Hua,Long, Ya-Qiu

supporting information, p. 2822 - 2825 (2014/06/23)

A fast and simple divergent synthesis of multisubstituted quinazolines and benzimidazoles was developed from readily available amidines, via iodine(III)-promoted oxidative C(sp3)-C(sp2) and C(sp 2)-N bond formation in nonpolar and polar solvents, respectively. Further selective synthesis of quinazolines in polar solvent was realized by TEMPO-catalyzed sp3C-H/sp2C-H direct coupling of the amidine with K2S2O8 as the oxidant. No metal, base, or other additives were needed.

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